Touch detection method, driver and touch display device

Abstract

A touch control method applied in a touch device, the touch display working during a plurality of display frames, a first-type blank period being between each two adjacent display frames, and each of the plurality of display frames comprising at least one second-type blank period and at least one third-type blank period; the touch detection method comprising: detecting a touch operation of a first touch object in at least one of the first-type blank period; judging whether a second touch object being detected in the at least one second-type blank period; and according to a result of the judging, detecting the touch operation of the first touch object or/and the second touch object in at least parts of the at least one third-type blank period. A driver and a touch display device is also provided.

The invention claimed is: 
     
       1. A touch detection method applied in a touch display device, the touch display working during a plurality of display frames, a first-type blank period being between each two adjacent display frames, and each of the plurality of display frames comprising at least one second-type blank period and at least one third-type blank period;
 the touch detection method comprising: 
 detecting a touch operation of a first touch object in at least one of the first-type blank period; 
 judging whether a second touch object being detected in the at least one second-type blank period; and 
 according to a result of the judging, detecting the touch operation of the first touch object or/and the second touch object in at least parts of the at least one third-type blank period, wherein the at least one second-type blank period and the at least parts of the at least one third-type blank period are in a same display frame. 
 
     
     
       2. The touch detection method of  claim 1 , wherein the touch display device comprises a plurality of common electrodes independent from each other;
 the plurality of common electrodes comprises a plurality of rows in a first direction in the at least one second-type blank period, and every two adjacent common electrodes in a same row electrically connected to each other; and 
 the step of judging whether a second touch object being detected in the at least one second-type blank period comprises: 
 scanning the plurality of rows to judge whether the second touch object is detected in the at least one second-type blank period. 
 
     
     
       3. The touch detection method of  claim 2 , wherein in the at least one third-type blank period, the plurality of common electrodes comprises a plurality of columns in a second direction, every two adjacent common electrodes in a same column are electrically connected to each other;
 the step of detecting the touch operation of the first touch object or/and the second touch object in at least parts of the at least one third-type blank period comprises: 
 scanning the plurality of columns in one of the at least one third-type blank period after the at least one second-type blank period if it is judged in the at least one second-type blank period that the second touch object is detected, wherein detecting the touch operation of the second touch object once is completed in the at least one second-type blank period and the one of the at least one third-type blank period jointly. 
 
     
     
       4. The touch detection method of  claim 1 , wherein each of the plurality of display frame comprises a plurality of second-type blank periods, the plurality of second-type blank periods precede the at least one third-type blank period; and
 whether the second touch object is detected is judged in each of the plurality of second-type blank period once, it is judged the second touch object is detected if it is judged the second touch object is detected in each of the plurality of the second-type blank period. 
 
     
     
       5. The touch detection method of  claim 1 , wherein the step of detecting the touch operation of the first touch object or/and the second touch object in at least parts of the at least one third-type blank period comprises:
 detecting the touch operation of the second touch object in the at least one third-type blank period if it is judged the second touch object is detected. 
 
     
     
       6. The touch detection method of  claim 1 , wherein each of the plurality of display frames comprises a plurality of second-type blank periods, at least one third-type blank period is between each two adjacent second-type blank periods, whether the second touch object is detected is judged in each of the plurality of second-type blank period once; and
 the step of detecting the touch operation of the first touch object or/and the second touch object in at least parts of the at least one third-type blank period comprises: 
 detecting the touch operation of the first touch object and/or the second touch object in at least parts of the third-type blank period between the two adjacent second-type blank periods according to the result of the judging in each of the second-type blank periods. 
 
     
     
       7. The touch detection method of  claim 6 , wherein the step of detecting the touch operation of the first touch object and/or the second touch object in at least parts of third-type blank period between two adjacent second-type blank periods according to the result of the judging in each of the second-type blank periods is specifically:
 detecting the touch operation of the second touch object in at least parts of the third-type blank period between the two adjacent second-type blank periods if it is judged the second touch object is detected. 
 
     
     
       8. The touch detection method of  claim 1 , wherein the step of detecting the touch operation of the first touch object or/and the second touch object in at least parts of the at least one third-type blank period is specifically:
 detecting the touch operation of the first touch object in a part of the at least one third-type blank period and detecting the touch operation of the second touch object in the other part of the at least one third-type blank period if it is judged in the at least one second-type blank period that the second touch object is detected; 
 wherein each of the at least one third-type blank period is configured to detect the touch operation of one of the first touch object and the second touch object. 
 
     
     
       9. The touch detection method of  claim 1 , wherein in each of the plurality of display frames, a total duration for detecting the second touch object is greater than a total duration for detecting the first touch object if it being judged that there is the second touch object. 
     
     
       10. The touch detection method of  claim 1 , wherein the first touch object is configured to receive a scanning signal from the touch display device, and the second touch object is configured to transmit a scanning signal to the touch display device. 
     
     
       11. A driver applied in a touch display device working during a plurality of display frames, a first-type blank period being between each two adjacent display frames, each of the plurality of display frames comprising at least one second-type blank period and at least one third-type blank period;
 the driver comprising: 
 a first detection module configured to detect a touch operation of a first touch object in at least one of the first-type blank period; 
 a judging module configured to judge whether a second touch object being detected in the at least one second-type blank period; and 
 a second detection module configured to detect the touch operation of the first touch object or/and the second touch object in at least parts of the at least one third-type blank period according to a result of the judging, wherein the at least one second-type blank period and the at least parts of the at least one third-type blank period are in a same display frame. 
 
     
     
       12. A touch display device working during a plurality of display frames, a first-type blank period being between each two adjacent display frames, each of the plurality of display frames comprising at least one second-type blank period and at least one third-type blank period, the touch display device comprising:
 a touch display module; and 
 a driver configured to detect a touch operation of a first touch object in at least one of the first-type blank period, judge whether a second touch object is detected in the at least one second-type blank period, and detect the touch operation of the first touch object or/and the second touch object in the at least one third-type blank period according to a result of the judging, wherein the at least one second-type blank period and the at least one third-type blank period are in a same display frame; 
 wherein the driver drives the touch display device to display images in the plurality of display frames except the at least one second-type blank period and the at least one third-type blank period. 
 
     
     
       13. The touch detection method of  claim 2 , wherein the step of detecting the touch operation of the first touch object or/and the second touch object in at least parts of the at least one third-type blank period comprises:
 detecting the touch operation of the second touch object in the at least one third-type blank period if it is judged the second touch object is detected. 
 
     
     
       14. The touch detection method of  claim 3 , wherein the step of detecting the touch operation of the first touch object or/and the second touch object in at least parts of the at least one third-type blank period comprises:
 detecting the touch operation of the second touch object in the at least one third-type blank period if it is judged the second touch object is detected. 
 
     
     
       15. The touch detection method of  claim 4 , wherein the step of detecting the touch operation of the first touch object or/and the second touch object in at least parts of the at least one third-type blank period comprises:
 detecting the touch operation of the second touch object in the at least one third-type blank period if it is judged the second touch object is detected.